| (19) |
 |
|
(11) |
EP 1 057 854 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
10.01.2001 Bulletin 2001/02 |
| (43) |
Date of publication A2: |
|
06.12.2000 Bulletin 2000/49 |
| (22) |
Date of filing: 26.05.2000 |
|
| (51) |
International Patent Classification (IPC)7: C08J 11/08 |
|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
31.05.1999 JP 15293199
|
| (71) |
Applicant: SONY CORPORATION |
|
Tokyo (JP) |
|
| (72) |
Inventors: |
|
- Noguchi, Tsutomu
Shinagawa-ku, Tokyo (JP)
- Miyashita, Mayumi
Shinagawa-ku, Tokyo (JP)
- Kamei, Miyuki
Shinagawa-ku, Tokyo (JP)
|
| (74) |
Representative: MÜLLER & HOFFMANN Patentanwälte |
|
Innere Wiener Strasse 17
81667 München
81667 München (DE) |
|
| |
|
| (54) |
Method for reycling waste styrene resin |
(57) A recycling method which enables recycling of a high-quality regenerated styrene
resin. A waste styrene resin material is dissolved in an organic solvent boiling at
a temperature lower than 200°C and having solubility not less than 15 wt% at room
temperature to prepare a solution of the waste styrene resin material The resulting
solution is freed of volatile components on heating in vacuum to remove the organic
solvent to set the amount of the residual solvent in the styrene resin to 0.4 wt%
or less to recycle the resulting styrene resin as a regenerated styrene resin.